Jig-appliance bushing



feb. .20, 1945.

H. TESTO J IG -APPLIANCE BUSHING Filed Dec. 30,1942

f INI 'ENTOR.

.H5/ver 7557-0 ,Pafented Feb. zo, 1945 v r Application members@ 1942,' seriali Nel-470,549

,vfs'olairnsl (citar-62.) l

y My 'invention pertains Ato 'a vjigeappliancebush-y mg..l

Experience as rajrnechanie Aand machinisthas broughtme' familiarity with vman'y'shop applirances', includingdrill-guiding"jigs lhitherto in common Ause Y'and oom'p'rising'an overhangi'ngexr` tension projectinghorizontally ffrom' a' standard i fixed v'toa-drill -pressy and provided-with "a verticalr drill-guiding -bore usually through-adetachable part' I'aptj'toloosen ora-t leastt'o vibratefwitli consequent lackof l'drillingprecision. f f n 'Tlie objectief my invention -is` to Yextend utility and improvefacility of us'ewhilefatta'ining greater reliability by'providin'g varisized 'bushings which;

though -removablyymounted ina drill-press fixture,

A. o are rmuch'more riri `and reac'lfiof whichfis-inte-l grallly provided witlia overhangin'g, perforated flange! The horzontalfbore's'in'the'bushingsre n,

spectivelyfrn'ay vary in lsize and' Shape fan like wise Vthe diameter `of ltheverticaL drillguiding' bore in each. Mea/nsis providedfor securing'the bushings, as by the illustrated-set screwi and in axialalinement lwith said 'bushingare la Vpair-of reactingly mounted -plungers, Voneffbe'ing adapted frmly'to'ho'ld a'Workpieceltcapscrew or' bolt) 'and' theotherto dislodge the latter afterthe drilling operation and frel'easeiof the k'pressure-'of 'the first' plunger.; exempliedytheouter end ofthe bushing .bore yisslightlyf `i-llle'ted 'and the 'per-foi rated drill-guiding angerfis of segrnentallsliape y to insure adequate rigidity.

lAdvertingtothe.drawing- A 1 Figure 1 is an elevation of an appliance embodying my invention, with certain parts in vertical section. *l

Figure 2 is an enlarged view on line 2-2 of` .'Fig. 1.

Figure 3 is an enlarged view on line 3-r-3 `of I Figure 1.

` 4Figure 4 is an enlarged View on line 4--4 of .Figure 1. o

This invention has'been `in popular, defense production use for several months.

A- base member I, to be considered as firmly secured to the tableoi a drill press, comprises a standard 2 having a varisized horizontal bore, mostly of one diameter as at 3, but with `a some- Vvwhat smaller diameter 4 'atone end. Aguide vbushing 5 is tted in the smaller bore 4 and is fmovably occupied by a plunger 6 which carries l within the bore 3 aA collar 'I adapted to confrne'a spring 8 against the inner end of the guide bushing E, whereby the plunger is reactinglymounted.

The opposite end of the plunger 6 occupies the constitlltxig 4one of the primary *featuresofV invention; and removably seated'v inthe Yborej'3; Theouter end ofthe bushing IDisenlarged as enlarged for the reception of the shank-oil astqve boltgcapscrewor'the like I3. 'Ihefoutermost end 'onf-jthe-b'ore enlargement I2-may gbefflleted, or slightly countersinkas 4vshown." Overhan'ging from' the/flange' IIV is a segmentalflange |4'W'hich is,v yprovided just beyond 'the'Y face otthelangeVL I I with 4a'-"yert'icill"drillfguiding holev I5;`r "The latter is intended f-to guide the drillfshown-inbroken lines invFgure 1, preparatory tojdrillngone--or A more holes *radiallyl through the channeled# head v ceive locking' wirejrih-tertwinedor sealed tofinsurea'gainst-loosen-ing ofltheattaching members. TheA sturdyfintegral, lhardened steel bushing II! ofV my' Adesign isy :Very firm; readily replaced with another, vlonger 'orfshorter'y withla diierentsized f bore orfwitha diierentl sized drill-guiding hole.

j fixing the .guide bushing S-anddrill-bushingfIll 'l' l respectively, in desired positions; :As willbe' read-Y smaller end 9 ofa'borein the drill-jig'bushing l0' 5 .Set screws Il and I8 serve the'usual'iunctionof ily"un'd'ersto'od,1the plunger '6 may Joe employed-liso dislodge the drilled article. y. Y f

Cooperating to hold .the workpiece'notfonlylin' its inserted position, butagainst anyy turningjdis.-

A' placement during the'operation ofidrillingra-hole through thehea'dfthereof, islthe mechanismf-next describedlf ifAnother.` plunger I9, as `.exemplified withA `a lbevelled extremity: 2 0 v.adapted y:to enterv the' slot in the head ofthe workpiece, is reciprocable-in a coaxial bore' 2I of another standard 22. The plunger 'I9 is fashioned with a spline groove 23 adapted to be interrsected bythe inner end of a set screw 24 whereby to permit reciprocation of n ing hole is to be supplied to an article and after the set screw 24 has been retracted from the-bore 2I. Then the handle 30 may be swung in opposite directions throughl predetermined arcs of movementfrom the vertical position against one or the .other of two stops 3|, preparatory to being manually held successively against one and then the other duringthe drilling of two holes through any particular workpiece, as is sometimes' speci- 4ned. It will be realized thatI the two plungers 6 and I9 acting in opposition to each other contrive to hold each workpiece in the bushing I as re-A quired f or reliability of precision.

, The collar 29 carries a hook 32 linked with a ring 33 which is linked in another ring 34 and the latter similarly articulates loosely with an eye 35 on a lever 36 having its lower end pivoted at 31. Thus a limited swivel connection is provided permitting. selectable turning of the plunger I9 if andgwhen desired, whereas a pull exerted on the upper end of the lever 36, against the action of the spring 2l accomplishes the withdrawal of the tip 2li preparatory to dislodgement of the workpiece by a snap release of the plunger 6 under the urge of the spring 8 against the collar l.

I claim: A

1. A Jig appliance comprising the combination with a fixture provided with a variously sized bore, a plunger reactingly mounted in said bore` and a bushing removably inserted in said bore and adapted to confine a workpiece, said bushing being provided with an overhanging, perforated flange and means for holding said workpiece in said bushingsaid plunger being adapted to enter said bushing to discharge said workpiece when said holding means is withdrawn.

2. A jig appliance comprising the combination of a fixture provided with a bore, a drill-guiding bushing inserted in said bore, said bushing being provided with an axially extending, perforated flange, means for holding a workpiece in one end of said bushing and means entering the opposite end of said bushing for dislodging the workpiece from said bushing.

3. A jig appliance comprising the combination with a support provided with a substantially horizontal bore, a plunger reactingly mounted in said bore, a drill-guiding bushing removably inserted in said bore, said bushing being provided with an upper, segmental ange having a substantially vertical bore and another axially alined plunger 5. A drill-guiding appliance comprising the combination with a support provided with a hole, of a plunger mounted in said hole, a bushing occupying one end of said hole, means for xing said bushing therein, said bushing having the outer end of its bore enlarged and being provided on one side with a radially perforated flange, another plunger adapted to hold a workpiece in said bushing, means for controlling the position of the first mentioned plunger and means for controlling the position of said second mentioned plunger. v

6. A drill-guiding bushing having an opening therethrough and comprising a smaller end intended for mounting in a hollow support, the outer end of the opening in said bushing being enlarged, thedifferently sized portions of said opening being adapted to receive the shank and the head of a screw, the outer end of said bushing being enlarged and carrying an axially projecting segmental ange provided with a radially directed drill-receiving hole which is crossed by lthe head of a screw occupying the enlargement of the axial opening in said bushing.

7. A jig-appliance comprising the combination of a pair of spaced-apart standards each provided with a bore, said bores being axially alined, a drill-guiding bushing inserted in one of said bores, said bushing being provided with a ange having a radially extending bore and separate, reciprocally-operative mechanisms each including a part movable in one of said bores in a standard, said mechanism parts being respectively adapted to engage a diierent one of the ends of an article occupying said bushing.

8. A drill-guiding jig appliance comprising the combination of a support having a standard provided with a bore open at both ends, a plunger mounted in said bore, a drill-guiding bushing loccupying one end of said bore, said bushing being provided with a radially perforated ilange projecting in an axial direction from the outer end of said bushing, another standard on said "support, an axially alined plunger movable in said last mentioned standard and provided with a spline groove and adapted to hold a workpiece `in said bushing, a set screw in said last mentioned Vvstandard and adapted to enter said spline groove,

means for actuating said last mentioned plunger laxially and means for turning said last mentioned plunger when said set screw is retracted from said spline groove.

HENRY TESTO. 

